Add time:08/02/2019         Source:sciencedirect.com

Low pressure chemical vapour deposition (LPCVD) of [ZrCp2(NMe2)2] (1), [ZrCp2(η2-MeNCH2CH2NMe)] (2), [ZrCp′2(NMe2)2] (3) and [ZrCp′2(NEt2)2] (4) (Cp = η5-cyclopentadienyl, Cp′ = η5-monomethylcyclopentadienyl), onto glass substrates at 600 °C, afforded highly reflective and adhesive films of zirconium carbide and amorphous carbon. Powder XRD indicated that the films were largely amorphous, although small, broad peaks accounting for ZrC and ZrO2 were present, suggesting that the remaining carbon was due to amorphous deposits from the cyclopentadienyl ligands. SEM images showed an island-growth mechanism with distinct crevices between the concentric nodules. Plasma-enhanced atomic layer deposition (PEALD) of compounds 1 and 2 showed that the precursors were not sufficiently stable or volatile to give a good rate of film growth.

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